add OpenSSL exception to PowerDNS, Netherlabs, van Dijk and Hubert copyrights

[thirdparty/pdns.git] / pdns / dynloader.cc

/*
    PowerDNS Versatile Database Driven Nameserver
    Copyright (C) 2002 - 2008  PowerDNS.COM BV

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as 
    published by the Free Software Foundation

    Additionally, the license of this program contains a special
    exception which allows to distribute the program in binary form when
    it is linked against OpenSSL.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <unistd.h>
#include <errno.h>
#include <climits>
#include <string>
#include <map>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/types.h>
#include <boost/shared_ptr.hpp>

#include <sys/stat.h>
#include "pdnsexception.hh"
#include "misc.hh"
#include "dynmessenger.hh"
#include "arguments.hh"
#include "config.h"
#include "statbag.hh"
#include "misc.hh"
#include "namespaces.hh"
#include "namespaces.hh"

ArgvMap &arg()
{
  static ArgvMap arg;
  return arg;
}

StatBag S;

int main(int argc, char **argv)
{
  string s_programname="pdns";
  string localdir;

  ::arg().set("config-dir","Location of configuration directory (pdns.conf)")=SYSCONFDIR;
  ::arg().set("socket-dir","Where the controlsocket will live")=LOCALSTATEDIR;
  ::arg().set("remote-address","Remote address to query");
  ::arg().set("remote-port","Remote port to query")="53000";
  ::arg().set("secret","Secret needed to connect to remote PowerDNS");

  ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")="";
  ::arg().setCmd("no-config","Don't parse configuration file");
  ::arg().set("chroot","")="";
  ::arg().setCmd("help","Provide a helpful message");
  ::arg().laxParse(argc,argv);

  if(::arg().mustDo("help")) {
    cerr<<"syntax:"<<endl<<endl;
    cerr<<::arg().helpstring(::arg()["help"])<<endl;
    exit(99);
  }

  const vector<string>commands=::arg().getCommands();

  if(commands.empty()) {
    cerr<<"No command passed"<<endl;
    return 0;
  }

  if(::arg()["config-name"]!="") 
    s_programname+="-"+::arg()["config-name"];

  string configname=::arg()["config-dir"]+"/"+s_programname+".conf";
  cleanSlashes(configname);

  if(!::arg().mustDo("no-config")) {
    ::arg().laxFile(configname.c_str());
    ::arg().laxParse(argc,argv); // reparse so the commandline still wins
  }
  
  string socketname=::arg()["socket-dir"]+"/"+s_programname+".controlsocket";
  cleanSlashes(socketname);
  
  if(::arg()["chroot"].empty())
    localdir="/tmp";
  else
    localdir=dirname(strdup(socketname.c_str()));

  try {
    string command=commands[0];
    shared_ptr<DynMessenger> D;
    if(::arg()["remote-address"].empty())
      D=shared_ptr<DynMessenger>(new DynMessenger(localdir,socketname));
    else {
      uint16_t port;
      try {
        port  = lexical_cast<uint16_t>(::arg()["remote-port"]);
      }
      catch(...) {
        cerr<<"Unable to convert '"<<::arg()["remote-port"]<<"' to a port number for connecting to remote PowerDNS\n";
        exit(99);
      }
      
      D=shared_ptr<DynMessenger>(new DynMessenger(ComboAddress(::arg()["remote-address"], port), ::arg()["secret"]));
    }

    string message;
    for(vector<string>::const_iterator i=commands.begin();i!=commands.end();++i) {
      if(i!=commands.begin())
        message+=" ";
      message+=*i;
    }
    
    if(command=="show") {
      message="SHOW ";
      for(unsigned int n=1;n<commands.size();n++) {
        message+=commands[n];
        message+=" ";
      }
    }
    else if(command=="list") {
      message="SHOW *";
      command="show";
    }
    else if(command=="quit" || command=="QUIT") {
      message="QUIT";
    }
    else if(command=="status" || command=="STATUS") {
      message="STATUS";
    }
    else if(command=="version" || command=="VERSION") {
      message="VERSION";
    }
    
    
    if(D->send(message)<0) {
      cerr<<"Error sending command"<<endl;
      return 1;
    }
    
    string resp=D->receive();
    
    cout<<resp<<endl;
  }
  catch(PDNSException &ae) {
    cerr<<"Fatal error: "<<ae.reason<<endl;
    return 1;
  }
  return 0;
}